Proper MouseEvent targeting. Adds a Window method that locates a Window for a given point.

aura/event.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AURA_EVENT_H_
 #define AURA_EVENT_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/time.h"
 #include "ui/base/events.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/point.h"
 
 namespace aura {
 
 #if defined(OS_WIN)
 typedef MSG NativeEvent;
 #elif defined(USE_X11)
 typedef union _XEvent XEvent;
 typedef XEvent* NativeEvent;
 #endif
 
+class Window;
+
 class Event {
  public:
   const NativeEvent& native_event() const { return native_event_; }
   ui::EventType type() const { return type_; }
   const base::Time& time_stamp() const { return time_stamp_; }
   int flags() const { return flags_; }
 
  protected:
   Event(ui::EventType type, int flags);
   Event(NativeEvent native_event, ui::EventType type, int flags);
@@ skipping 14 matching lines @@
 
 class LocatedEvent : public Event {
  public:
   int x() const { return location_.x(); }
   int y() const { return location_.y(); }
   gfx::Point location() const { return location_; }
 
  protected:
   explicit LocatedEvent(NativeEvent native_event);
 
+  // Create a new LocatedEvent which is identical to the provided model.
+  // If source / target windows are provided, the model location will be
+  // converted from |source| coordinate system to |target| coordinate system.
+  LocatedEvent(const LocatedEvent& model, Window* source, Window* target);
+
   gfx::Point location_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LocatedEvent);
 };
 
 class MouseEvent : public LocatedEvent {
  public:
   explicit MouseEvent(NativeEvent native_event);
 
+  // Create a new MouseEvent which is identical to the provided model.
+  // If source / target windows are provided, the model location will be
+  // converted from |source| coordinate system to |target| coordinate system.
+  MouseEvent(const MouseEvent& model, Window* source, Window* target);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(MouseEvent);
 };
 
 
 }  // namespace aura
 
 #endif  // AURA_EVENT_H_